--- graphics/mozjpeg/files/patch-jcdctmgr.c	(revision 0)
+++ graphics/mozjpeg/files/patch-jcdctmgr.c	(working copy)
@@ -0,0 +1,41 @@ 
+--- jcdctmgr.c.orig	2015-05-18 16:28:09.000000000 +0200
++++ jcdctmgr.c	2015-08-30 02:21:25.079140000 +0200
+@@ -6,7 +6,7 @@
+  * libjpeg-turbo Modifications:
+  * Copyright (C) 1999-2006, MIYASAKA Masaru.
+  * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+- * Copyright (C) 2011, 2014 D. R. Commander
++ * Copyright (C) 2011, 2014-2015 D. R. Commander
+  * mozjpeg Modifications:
+  * Copyright (C) 2014, Mozilla Corporation.
+  * For conditions of distribution and use, see the accompanying README file.
+@@ -185,6 +185,19 @@ compute_reciprocal (UINT16 divisor, DCTE
+   UDCTELEM c;
+   int b, r;
+ 
++  if (divisor == 1) {
++    /* divisor == 1 means unquantized, so these reciprocal/correction/shift
++     * values will cause the C quantization algorithm to act like the
++     * identity function.  Since only the C quantization algorithm is used in
++     * these cases, the scale value is irrelevant.
++     */
++    dtbl[DCTSIZE2 * 0] = (DCTELEM) 1;                       /* reciprocal */
++    dtbl[DCTSIZE2 * 1] = (DCTELEM) 0;                       /* correction */
++    dtbl[DCTSIZE2 * 2] = (DCTELEM) 1;                       /* scale */
++    dtbl[DCTSIZE2 * 3] = (DCTELEM) (-sizeof(DCTELEM) * 8);  /* shift */
++    return 0;
++  }
++
+   b = flss(divisor) - 1;
+   r  = sizeof(DCTELEM) * 8 + b;
+ 
+@@ -589,7 +602,8 @@ quantize (JCOEFPTR coef_block, DCTELEM *
+ 
+ #if BITS_IN_JSAMPLE == 8
+ 
+-  UDCTELEM recip, corr, shift;
++  UDCTELEM recip, corr;
++  int shift;
+   UDCTELEM2 product;
+ 
+   for (i = 0; i < DCTSIZE2; i++) {